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Finding the Fourth Proportional to 143,553.25, 215,331.80 and 45,057.25

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Solution

The fourth proportional to 143,553.25, 215,331.80 and 45,057.25 is: 67,586.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,553.25 : 215,331.80 = 45,057.25 : x
  2. Step 2: Convert to fraction form
    143,553.25/215,331.80 = 45,057.25/x
  3. Step 3: Cross multiply
    143,553.25x = 215,331.80 × 45,057.25
  4. Step 4: Simplify right side
    143,553.25x = 9,702,258,520.26
  5. Step 5: Solve for x
    x = 9,702,258,520.26/143,553.25
  6. Step 6: Final answer
    x = 67,586.48

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.